Way out in the west of the town of Mercedd (which is actually the desert of Drize from Did I Ever Tell You How Lucky You Are? in the video Dr. Seuss's Sleep Book) There is a clubhouse (not seen on the outside anywhere of the book or video) called the Hinkle-Horn Honking Club.
There are 5 or more Hinkle-Horn Honkers who are sleeping in their bed at night. Their horns are hanging on a hook in its own private Hinkle-Horn Nook with names on the top such as Freddy, George, and Henry. the other names have been cut from the page of the book.
When the dawn of the morning comes they will wake up quite fresh ready to start back honking on their Hinkle-Horns again eventually.